When you are attempting to get people, who you don’t have a close/good relationship with (i.e. a history of reciprocity) to do things for you, you need to give them an incentive.
The most obvious incentive is financial reward, but of course this may be against the contest’s rules. The next incentive (that I think of at the moment) is self-gratification.
Using the example you provided, you can craft a message that conveys something along the lines of “Vote for Education and show the world how much you care about children.” Of course, this is not a very subtle appeal, but it can be the essence of your message. Just get creative about how you say the above, that is think conceptually about that message rather than literally. For more details visit buy 10best votes